31 July 2011 C1 CIVIL AVIATION DEPARTMENT HONG KONG ...

2.1.2 Where the equipment is to be the subject of an application to theDirector-General for Accessory Approval or Appliance Registration, asprovided by HKAR-1 Sub-section 1.4-8 or 1.4-10, the level ofSoftware Criticality Category shall be declared in the Declaration ofDesign and Performance.2.1.3 Where the equipment or system is to be approved under the ComponentProcedure of HKAR-1 Sub-section 1.4-8 or, under the aircraftmodification procedure of HKAR-1 Sub-section 1.2-5, the SoftwareCriticality Category of the equipment or system shall be declared.2.1.4 Details of equipment and system Software Criticality Categories shouldbe provided to the aircraft operators to assist in the evaluation of postcertificationmodifications (see paragraph 2.3).2.2 Initial CertificationIn respect of a software-based equipment or system, the responsible DesignOrganisation shall provide evidence to the Director-General that the softwarehas been designed, tested and integrated with the hardware in a manner whichensures compliance with HKAR-1 (see paragraph 3.1).2.3 Post-Certification ModificationsIn respect of equipment and systems with software in the Major, Hazardous orCatastrophic Criticality Categories, a modification which affects software shallnot be embodied unless it has been approved by the responsible DesignOrganisation (see paragraph 3.2).3 Interpretation of Requirements3.1 Initial Certification3.1.1 An applicant for the approval of a software-based equipment or systemmay use the guidance material given in document DO-l78/ED-12 (or anagreed equivalent standard) as a means of securing CAD approval of theassociated software.3.1.2 A software Configuration Management Plan, e.g. as defined in Part 7 ofdocument DO-178/ED-12, will be required as a means of softwareidentification and change control to be effective throughout the life of theequipment. The plan will need to be managed by the responsibleDesign Organisation.3.2 Post-Certification Modifications3.2.lModifications to software will be subject to the same approvalprocedures as are applied to hardware modifications (see HKAR-131 January 2002 AN-45 P.2